***So Gentile should force Seventh day Adventist or any other Seventh day Sabbath keeper to observe Sunday then?***
Again you have fallen into the “honoring the day” trap.
Christians DO NOT honor Sunday, we honor the LORD JESUS CHRIST, and CHRISTIANS have been doing so from Pentecost, when the Holy Spirit was poured out on the believers (on a Sunday) till now!
There is no trap. There just is no command in the Bible to observe Sunday as the Sabbath. I know whom I believe and whether Pentecost came on Sunday or any other day you are imposing a tradition and I know about tradition of men from Christ when it conflicts with God’s word (Mathew 15:3). But as a Christian I still have a sabbath “Heb 4:9 There remaineth therefore a rest(sabbath) to the people of God.”